前语言阶段
前语言阶段-
婴儿最早发出的多种声音不能算是早期的语言，是前语言阶段。
The earliest sounds produced by infants cannot be considered early language .
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普通话儿童前语言阶段与早期语言阶段音高之比较
A Comparison of Mandarin-speaking Children 's Pitch at the Pre-linguistic and Early Speech Stages
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语言测试主要经历过三个阶段，第一阶段是在较为正式的语言测试理论形成之前的前科学语言测试阶段；
There are three main stages of language tests before Bachman put forward the model of communicative approach . The first stage is the time before the regular and formal language testing theory was formed , which is called pre-scientific period .